If a high school student was caught dating in school, but the teacher had no evidence, did the teacher have the right to expel or suspend the student's class?

Under normal circumstances, teachers would not expel or suspend students if they did not have evidence that they were in a relationship at school. This is because love is a private act. The school has the responsibility to ensure that students abide by the school's rules and discipline, but has no right to expel or suspend students. If a teacher suspects that a student is dating at school but cannot obtain conclusive evidence, they can take other measures to guide and help the student. For example, teachers could talk to students to remind them to abide by school rules and discipline, or they could ask the school management for help. It should be noted that if the teacher takes unnecessary or unfair measures, such as discrimination against a student or unnecessary punishment, it may lead to conflicts between the student and the school. Therefore, teachers should abide by the rules and discipline of the school and take fair and appropriate measures to help students.